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Tor 0.4.9.0-alpha-dev
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Header file for relay.c. More...
Go to the source code of this file.
Macros | |
| #define | CONTROL_CELL_ID 0 |
| #define | relay_send_command_from_edge(stream_id, circ, relay_command, payload, payload_len, cpath_layer) |
| #define | packed_cell_free(cell) FREE_AND_NULL(packed_cell_t, packed_cell_free_, (cell)) |
| #define | update_circuit_on_cmux(circ, direction) update_circuit_on_cmux_((circ), (direction), SHORT_FILE__, __LINE__) |
Functions | |
| const char * | relay_command_to_string (uint8_t command) |
| void | relay_consensus_has_changed (const networkstatus_t *ns) |
| uint32_t | relay_get_param_max_circuit_cell_queue_size (const networkstatus_t *ns) |
| int | circuit_receive_relay_cell (cell_t *cell, circuit_t *circ, cell_direction_t cell_direction) |
| size_t | cell_queues_get_total_allocation (void) |
| void | relay_header_pack (uint8_t *dest, const relay_header_t *src) |
| void | relay_header_unpack (relay_header_t *dest, const uint8_t *src) |
| int | relay_send_command_from_edge_ (streamid_t stream_id, circuit_t *circ, uint8_t relay_command, const char *payload, size_t payload_len, crypt_path_t *cpath_layer, const char *filename, int lineno) |
| int | connection_edge_send_command (edge_connection_t *fromconn, uint8_t relay_command, const char *payload, size_t payload_len) |
| int | connection_edge_package_raw_inbuf (edge_connection_t *conn, int package_partial, int *max_cells) |
| void | connection_edge_consider_sending_sendme (edge_connection_t *conn) |
| void | circuit_reset_sendme_randomness (circuit_t *circ) |
| void | dump_cell_pool_usage (int severity) |
| size_t | packed_cell_mem_cost (void) |
| int | have_been_under_memory_pressure (void) |
| void | packed_cell_free_ (packed_cell_t *cell) |
| void | cell_queue_init (cell_queue_t *queue) |
| void | cell_queue_clear (cell_queue_t *queue) |
| void | cell_queue_append (cell_queue_t *queue, packed_cell_t *cell) |
| void | cell_queue_append_packed_copy (circuit_t *circ, cell_queue_t *queue, int exitward, const cell_t *cell, int wide_circ_ids, int use_stats) |
| int | append_cell_to_circuit_queue (circuit_t *circ, channel_t *chan, cell_t *cell, cell_direction_t direction, streamid_t fromstream) |
| void | destroy_cell_queue_init (destroy_cell_queue_t *queue) |
| void | destroy_cell_queue_clear (destroy_cell_queue_t *queue) |
| void | destroy_cell_queue_append (destroy_cell_queue_t *queue, circid_t circid, uint8_t reason) |
| void | channel_unlink_all_circuits (channel_t *chan, smartlist_t *detached_out) |
| int | channel_flush_from_first_active_circuit (channel_t *chan, int max) |
| int | circuit_package_relay_cell (cell_t *cell, circuit_t *circ, cell_direction_t cell_direction, crypt_path_t *layer_hint, streamid_t on_stream, const char *filename, int lineno) |
| void | update_circuit_on_cmux_ (circuit_t *circ, cell_direction_t direction, const char *file, int lineno) |
| int | append_address_to_payload (uint8_t *payload_out, const tor_addr_t *addr) |
| const uint8_t * | decode_address_from_payload (tor_addr_t *addr_out, const uint8_t *payload, int payload_len) |
| void | circuit_clear_cell_queue (circuit_t *circ, channel_t *chan) |
| circid_t | packed_cell_get_circid (const packed_cell_t *cell, int wide_circ_ids) |
| uint8_t | packed_cell_get_command (const packed_cell_t *cell, int wide_circ_ids) |
Variables | |
| uint64_t | stats_n_relay_cells_relayed |
| uint64_t | stats_n_relay_cells_delivered |
| uint64_t | stats_n_circ_max_cell_reached |
| uint64_t | stats_n_circ_max_cell_outq_reached |
| uint64_t | stats_n_data_cells_packaged |
| uint64_t | stats_n_data_bytes_packaged |
| uint64_t | stats_n_data_cells_received |
| uint64_t | stats_n_data_bytes_received |
| uint64_t | oom_stats_n_bytes_removed_dns |
| uint64_t | oom_stats_n_bytes_removed_cell |
| uint64_t | oom_stats_n_bytes_removed_geoip |
| uint64_t | oom_stats_n_bytes_removed_hsdir |
| #define packed_cell_free | ( | cell | ) | FREE_AND_NULL(packed_cell_t, packed_cell_free_, (cell)) |
| #define relay_send_command_from_edge | ( | stream_id, | |
| circ, | |||
| relay_command, | |||
| payload, | |||
| payload_len, | |||
| cpath_layer | |||
| ) |
| #define update_circuit_on_cmux | ( | circ, | |
| direction | |||
| ) | update_circuit_on_cmux_((circ), (direction), SHORT_FILE__, __LINE__) |
| int append_address_to_payload | ( | uint8_t * | payload_out, |
| const tor_addr_t * | addr | ||
| ) |
Append an encoded value of addr to payload_out, which must have at least 18 bytes of free space. The encoding is, as specified in tor-spec.txt: RESOLVED_TYPE_IPV4 or RESOLVED_TYPE_IPV6 [1 byte] LENGTH [1 byte] ADDRESS [length bytes] Return the number of bytes added, or -1 on error
| int append_cell_to_circuit_queue | ( | circuit_t * | circ, |
| channel_t * | chan, | ||
| cell_t * | cell, | ||
| cell_direction_t | direction, | ||
| streamid_t | fromstream | ||
| ) |
Add cell to the queue of circ writing to chan transmitting in direction.
The given cell is copied onto the circuit queue so the caller must cleanup the memory.
This function is part of the fast path.
Return 1 if the cell was successfully sent. Return 0 if the cell can not be sent. The caller MUST NOT close the circuit. Return -1 indicating an error and that the caller should mark the circuit for close.
| void cell_queue_append | ( | cell_queue_t * | queue, |
| packed_cell_t * | cell | ||
| ) |
Append cell to the end of queue.
Definition at line 2760 of file relay.c.
Referenced by cell_queue_append_packed_copy().
| void cell_queue_append_packed_copy | ( | circuit_t * | circ, |
| cell_queue_t * | queue, | ||
| int | exitward, | ||
| const cell_t * | cell, | ||
| int | wide_circ_ids, | ||
| int | use_stats | ||
| ) |
| void cell_queue_clear | ( | cell_queue_t * | queue | ) |
Remove and free every cell in queue.
Definition at line 2795 of file relay.c.
Referenced by circuit_clear_cell_queue().
| void cell_queue_init | ( | cell_queue_t * | queue | ) |
Initialize queue as an empty cell queue.
Definition at line 2787 of file relay.c.
Referenced by init_circuit_base().
| int channel_flush_from_first_active_circuit | ( | channel_t * | chan, |
| int | max | ||
| ) |
| void channel_unlink_all_circuits | ( | channel_t * | chan, |
| smartlist_t * | circuits_out | ||
| ) |
Remove all circuits from the cmux on chan.
If circuits_out is non-NULL, add all detached circuits to circuits_out.
Definition at line 3038 of file relay.c.
Referenced by circuit_unlink_all_from_channel().
Remove all the cells queued on circ for chan.
Definition at line 3551 of file relay.c.
Referenced by circuit_about_to_free_atexit().
| int circuit_package_relay_cell | ( | cell_t * | cell, |
| circuit_t * | circ, | ||
| cell_direction_t | cell_direction, | ||
| crypt_path_t * | layer_hint, | ||
| streamid_t | on_stream, | ||
| const char * | filename, | ||
| int | lineno | ||
| ) |
Package a relay cell from an edge:
Return 1 if the cell was successfully sent as in queued on the circuit. Return 0 if the cell needs to be dropped as in ignored. Return -1 on error for which the circuit should be marked for close.
| int circuit_receive_relay_cell | ( | cell_t * | cell, |
| circuit_t * | circ, | ||
| cell_direction_t | cell_direction | ||
| ) |
Receive a relay cell:
Return -reason on failure.
| void circuit_reset_sendme_randomness | ( | circuit_t * | circ | ) |
Called when initializing a circuit, or when we have reached the end of the window in which we need to send some randomness so that incoming sendme cells will be unpredictable. Resets the flags and picks a new window.
Definition at line 2252 of file relay.c.
Referenced by init_circuit_base().
| int connection_edge_package_raw_inbuf | ( | edge_connection_t * | conn, |
| int | package_partial, | ||
| int * | max_cells | ||
| ) |
If conn has an entire relay payload of bytes on its inbuf (or package_partial is true), and the appropriate package windows aren't empty, grab a cell and send it down the circuit.
If *max_cells is given, package no more than max_cells. Decrement *max_cells by the number of cells packaged.
Return -1 (and send a RELAY_COMMAND_END cell if necessary) if conn should be marked for close, else return 0.
| int connection_edge_send_command | ( | edge_connection_t * | fromconn, |
| uint8_t | relay_command, | ||
| const char * | payload, | ||
| size_t | payload_len | ||
| ) |
Make a relay cell out of relay_command and payload, and send it onto the open circuit circ. fromconn is the stream that's sending the relay cell, or NULL if it's a control cell. cpath_layer is NULL for OR->OP cells, or the destination hop for OP->OR cells.
If you can't send the cell, mark the circuit for close and return -1. Else return 0.
| const uint8_t * decode_address_from_payload | ( | tor_addr_t * | addr_out, |
| const uint8_t * | payload, | ||
| int | payload_len | ||
| ) |
Given payload_len bytes at payload, starting with an address encoded as by append_address_to_payload(), try to decode the address into *addr_out. Return the next byte in the payload after the address on success, or NULL on failure.
| void destroy_cell_queue_append | ( | destroy_cell_queue_t * | queue, |
| circid_t | circid, | ||
| uint8_t | reason | ||
| ) |
| void destroy_cell_queue_clear | ( | destroy_cell_queue_t * | queue | ) |
| void destroy_cell_queue_init | ( | destroy_cell_queue_t * | queue | ) |
| void dump_cell_pool_usage | ( | int | severity | ) |
Log current statistics for cell pool allocation at log level severity.
Definition at line 2733 of file relay.c.
Referenced by dumpmemusage().
| int have_been_under_memory_pressure | ( | void | ) |
| void packed_cell_free_ | ( | packed_cell_t * | cell | ) |
| circid_t packed_cell_get_circid | ( | const packed_cell_t * | cell, |
| int | wide_circ_ids | ||
| ) |
| uint8_t packed_cell_get_command | ( | const packed_cell_t * | cell, |
| int | wide_circ_ids | ||
| ) |
Extract the command from a packed cell.
Definition at line 3121 of file relay.c.
Referenced by write_packed_cell().
| size_t packed_cell_mem_cost | ( | void | ) |
| const char * relay_command_to_string | ( | uint8_t | command | ) |
Convert the relay command into a human-readable string.
Definition at line 522 of file relay.c.
Referenced by fill_single_stream_value().
| void relay_consensus_has_changed | ( | const networkstatus_t * | ns | ) |
| void relay_header_pack | ( | uint8_t * | dest, |
| const relay_header_t * | src | ||
| ) |
Pack the relay_header_t host-order structure src into network-order in the buffer dest. See tor-spec.txt for details about the wire format.
Definition at line 498 of file relay.c.
Referenced by relay_set_digest().
| void relay_header_unpack | ( | relay_header_t * | dest, |
| const uint8_t * | src | ||
| ) |
Unpack the network-order buffer src into a host-order relay_header_t structure dest.
Definition at line 511 of file relay.c.
Referenced by connection_exit_begin_conn(), connection_exit_begin_resolve(), pathbias_check_probe_response(), pathbias_count_valid_cells(), relay_lookup_conn(), and relay_set_digest().
| int relay_send_command_from_edge_ | ( | streamid_t | stream_id, |
| circuit_t * | orig_circ, | ||
| uint8_t | relay_command, | ||
| const char * | payload, | ||
| size_t | payload_len, | ||
| crypt_path_t * | cpath_layer, | ||
| const char * | filename, | ||
| int | lineno | ||
| ) |
Make a relay cell out of relay_command and payload, and send it onto the open circuit circ. stream_id is the ID on circ for the stream that's sending the relay cell, or 0 if it's a control cell. cpath_layer is NULL for OR->OP cells, or the destination hop for OP->OR cells.
If you can't send the cell, mark the circuit for close and return -1. Else return 0.
| void update_circuit_on_cmux_ | ( | circuit_t * | circ, |
| cell_direction_t | direction, | ||
| const char * | file, | ||
| int | lineno | ||
| ) |
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Stats: how many circuits have we closed due to the cell queue limit being reached (see append_cell_to_circuit_queue())
Definition at line 141 of file relay.c.
Referenced by fill_dos_values().
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1.9.4